1. Physical or Chemical
Properties

2. What is chemistry?
The study of matter and the way it interacts with other matter.

3. What is matter? Anything that has a mass and takes up space (volume).
What is the smallest piece of matter?

4. Classifying matter
Matter is classified into either mixtures or pure substances.
Mixtures can be either heterogeneous or homogeneous.
Pure substances can be either compounds or elements

5. Heterogeneous Mixtures
Have two or more visible parts
Example: Sand in water

6. Homogeneous Mixtures (solutions)
Mixtures that have only one visible part.
Example: Salt Water.

7. Compounds
Pure substances whose particles contain two or more different kinds of atoms.
Example: NaCl, H2O

8. Elements Pure substances that are made of only one kind of atom.
Example: Hg, Ca, Na

9. A characteristic of the substance that is used to identify the substance.
Colour, Hardness, Solubility, Lustre, Odour, Density, Melting/Boiling Point.
Includes State: solid, liquid, or gas.
Example: States of Water
Physical Property

10. Chemical Property
A characteristic or behaviour that becomes evident during or after a chemical reaction.
Such as: Reactivity with water, Reactivity with acid, combustibility, Reactivity with air. Ex. Baking Soda

11. Alters only the form or state of a substance
Alters only the form or state of a substance. NO new substance is created.
The chemical composition remains the same.
Usually reversible
Examples: Change of state:
Dissolving:
Change of form:
Physical Changes

12. Chemical Change
Changes a substance into a new substance that has different physical and chemical properties, and a new chemical formula.
Are NOT usually reversible. Substance cannot be easily changed into what it was before.
Chemical changes are the result of chemical reactions.

13. Signs of a chemical change
A permanent change in color.
Bubbles of gas are produced.
Two solutions mix to form a solid called a precipitate.
Energy in the form of heat or light is released or absorbed.
Electricity is produced.